Balloon

My grandson wants to install a Minecraft mod that he saw featured on YouTube. It is from a 2014 video and requires an older version of Minecraft and Forge. I spent 3 hours this morning trying to get at least one version of this mod to work on Windows 10, and failed. I was able to install Forge version 1.7.10-10.13.2.1230, but the mod for that version kept crashing. I installed Forge versions (using the Windows installer) 1.8.9-11.15.1.1722 1.8-11.14.4.1563 (after downloading and playing MC version 1.8 and 1.8.9), But when I re-start MC, those Forge Versions are not listed as one of the profiles to choose from. I tried installing Forge version 1.7.10-10.13.0.1180 and got the message "Successfully installed client profile Forge for version Forge 10.13.0.1180 into launcher and grabbed 0 required libraries" but the game crashes to desktop as soon as I select that profile and click "Play". There are loads of other older mods that my grandson has seen on Youtube and wants to try, and I don't want to disappoint him, but if getting these past Forge versions and mods to run should require manipulating versions of Java on my computer, I don't want to go there. Should I just tell him that we will install only new mods? I successfully installed a mod for version 1.12.2 and it worked perfectly.